<template>
  <div class="login">
    <div class="login_box">
      <div class="logo">
        <img src="../assets/logo.png" />
      </div>
      <!--表单区域 -->
      <el-form class="form" :model="formmsg" :rules="loginRules" ref="loginformRef">
        <!-- 账号 -->
        <el-form-item prop="username">
          <el-input prefix-icon="el-icon-user-solid" v-model="formmsg.username"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input type="password" prefix-icon="el-icon-lock" v-model="formmsg.password"></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLogin">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      formmsg: {
        username: "admin",
        password: "123456",
      },
      //   数据的校验规则
      loginRules: {
        username: [
          { required: true, message: "请输入用户名", trigger: "blur" },
          {
            min: 3,
            max: 10,
            message: "长度在 3 到 10 个字符",
            trigger: "blur",
          },
        ],
        password: [
          { required: true, message: "请输入密码", trigger: "blur" },
          {
            min: 3,
            max: 15,
            message: "长度在 3 到 15 个字符",
            trigger: "blur",
          },
        ],
      },
    };
  },
  methods: {
    //   重置
    resetLogin() {
      // resetFields()重置表单内容并移除校验规则
      this.$refs.loginformRef.resetFields();
    },
    // 登录
    login() {
      // 发送请求之前先对表单进行预校验
      this.$refs.loginformRef.validate(async (valid) => {
        // console.log(valid);
        // valid 是一个布尔值true表示表单预校验通过,可以发送请求,false表示没有通过表单验证,不允许发送请求
        if (!valid) return;
        // console.log(this); // vue实例
        const { data: res } = await this.$http.post("login", this.formmsg);
        if (res.meta.status != 200) return this.$message.error("登录失败");
        this.$message.success("登录成功");
        console.log(res.data.token);
        // 在登录成功之后将返回的token令牌保存在本地
        sessionStorage.setItem("token", res.data.token);
        // 跳转到home页面 编程式导航
        this.$router.push("/home");
      });
    },
  },
};
</script>

// <style lang="less" scope>
.login {
  width: 100%;
  height: 100%;
  background-color: #2b4b6b;
  .login_box {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 2px 3px 3px rgba(255, 255, 255, 0.6);
    .logo {
      position: absolute;
      left: 50%;
      top: -75px;
      transform: translateX(-50%);
      width: 130px;
      height: 130px;
      background-color: #fff;
      border: 1px solid #ccc;
      border-radius: 50%;
      overflow: hidden;
      padding: 10px;
      img {
        width: 100%;
        background-color: #ccc;
        border-radius: 50%;
      }
    }
  }
  .form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
    .btns {
      float: right;
    }
  }
}
</style>
